body{
    color: cornflowerblue;
    margin: 0;
    width: 100%;
    height: 100%;
    background: url("DownLoad/345.jpg") no-repeat;
    background-size: 100%;
    padding-top: 10%;
    /*padding: 150px;*/
    font-family: Georgia,Palatino,serif;
    /*font-family: Georgia,Palatino,serif; 字体的一些风格*/
}
p{color: #FFA500;font-size: 14px;text-align: center;}
h1,h2,h3,h4,h5{color: green; text-align: center;}
#red{color: red;}
#sidebar{
    color: red;
    font-size: 1em;
    font-weight: normal;
    font-style: italic;
    margin: 0;
    line-height: 2px;
    text-align: left;
}
table,th,tr{
    border: 1px solid green;
}
th{
    background-color: green;
    color: white;
}

form{
    text-align: center;
}

div{
    border: 0px solid cornflowerblue;
    width: 20%;
    height: 50%;
    margin: 0 auto;
    background:#EEEEEE;
}